Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '855efbcef9d76f6ee572a5bef10e8aacf2f671d9e076e56c12fe3c90eff1f789' 
  AND token = 'dLAhPvluhRJMY9Ee2Q6BWZbiQTfCp1OQG6e63ivkjmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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