Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a35de7f9fcc02490d05037ca57babeb4a7ca326086447bff7d539f882370150c' 
  AND token = 'i7dfY1VXUPGXoG8kp5pqHdmMgHkiS7RTVbKDvO00u4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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