Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1c1b33c47f26579f620988b160ddeb696694cdcedec4e3dc3a55423027a6a6e' 
  AND token = '4fX4JVqQuXylghODMaxGep3jiEXNNzthAHVsLWn2FlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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