Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'badbd19cce9eae15a488bc2fa992fdfbf29fa0360bb0da1940366bc3f16eaba2' 
  AND token = '+nE0x21ET1LKs6n1+lA8vcYdLvQMtyKc4lgyG8ZtMag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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