Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59aebe8061ab68370e2cc380c6f58376583758944cd39d6a7a3862aadfd94d29' 
  AND token = 'uAURMOVjqoOdiDL7RbZVotU5TSvrCgBrLKl6CDbycpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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