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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2204456cb45f2d17e35a0f01462a89a1f63ed5cc199a692af5a0555a160891e' 
  AND token = 'OqT9g5FDentXPxa+v1phDBPcIL0DolrEuSxPtIsvLYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}