Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '075e1491216d7fa3b26ca5341b9d6838908c16355be2d87ff4018f11f95f081e' 
  AND token = 're7W+X+v/nsfk5Np8URG/NN7Om9QMQFpEutWzTb4lcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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