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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a82fc7bd853b4aa21bb7c877496f55f7ced58c01b82134c3ac4be9283233bc0' 
  AND token = 'ZFasBwOmqLh/5o/LMbrAMbc0EOc35clxBjAUlkzKsxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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