Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a24c6ae89142afbfecd86ec450f2b0c9d853d8192b4a909449065264c24c72c6' 
  AND token = 'th9ijfJ2IrCndYdyywXTS3yKwE8mW3PzYu41T9Wb8kM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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