Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e5cf729c8da4be3973b179ce873215c1d7bbdae1d96632a29ba27e61169712b' 
  AND token = 'MVdQXYSpGQliKiW3inib/nidosGj+KZQq6dqAwroFkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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