Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd6eb92d6749aea7934a09e0f980f49358059af50276275a04d4789e28afc05a' 
  AND token = 'C9dAqjZ7M/l/cA9SskIEctmgUEZOykm0ccHP4gsWg6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00093

JSON explain

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