Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ef0ead5bf6dc972bc80c24806600481d440af0440ffdc15f8d76f69d0a7fbef' 
  AND token = 'QhNPuHRDmOMK79iB+6cd8sUuwNGlyCoWBUxZBZ8ZJD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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