Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee99f23eb368864ea363ed80cde51af6309c7ac38f88933935987abb48a5839' 
  AND token = 'NwED7HZxcZK4VHJ1GQl931lHM+DMk4eQ7LsnepXeKfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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