Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd7d4311e4a9384a5915d0c476f555a53a60d5c597e1c8705787d6b64c318fe' 
  AND token = 'JVlA8Ik1ffZdHU0uR1vg1Nqj0ceVqifvk1BljPgZ2fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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