Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5832fab7c89c1f44dbdd5b851d146e4e3a7d78a17a5462972f0188137d84b19' 
  AND token = 'd46uIQH+VxqTDUDRG5OShcOBh0+0aoUryesQVsUzQC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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