Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2be05e643a2efd661b689c3e50ce8da8a6e5986beb7c2c9e3fba5812711b887' 
  AND token = 'exWQGnxtubSW/YboM8GEszCPqVXEa9LA6uqVZ8TlIok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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