Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4124aaf55d00bff704b4f2ec0ef760fd298bf56827d8842d9e64bdc6c8916746' 
  AND token = 'OeXHUq4p6jsETgpBMxNWy4EEH4KzB0LbfgvnqZ7R1TU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00117

JSON explain

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