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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ecd2083d24403951252a9601c932d788bc312dd7de5c64d7ed1f5de3e4cb941' 
  AND token = '125mGgzkv3QGS/KTaJei7l6MEKWBJPhvwxkJaD+71s0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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