Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7adaa611eda36c87099f7e0a4f07c57c975af56a7969d7af24d682f3b0ae966' 
  AND token = 'E6SSj37dJuoAxXAXNps2IdkeO3R+nSC4V2cCl9OUKjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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