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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '219f880a67b4c0b6f04ad154a856ee2f2803337c2bade83a85dd388f17912d1a' 
  AND token = 'wHU2IZHrXxVzQ+cIUXqCMnfAPyBM9I2uWFojAIf9IHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00077

JSON explain

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