Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d2fe12def75604e12cdcede64fcb7c9dd42f6e6e50a126348f45f6c600bbdc7' 
  AND token = 'jIgX9qcl2isH2upbj9HFIHgGKQiomCyRHHxVKvMMiD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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