Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4850e8b931b90f2149f0906cc77dadc59b6af8e343b2ec5b9b022c8197edc559' 
  AND token = '+nx1tjQ6ZSjCxs06Av78CLBxPccTVJi1pA69pe+q2cQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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