Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45c3f6ad692f97e1d502719b7d7fff371655ea8c86d9c5704cbe0a696e91ddcc' 
  AND token = 'dl+Un14iE+CLJxPsG603sJuwuRF3LcekYUZtqj6G7RM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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