SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80e4151743ce1fe6d20b40b9c800d1abd57113b42748a54fbdc356292836467e' 
  AND token = 'ufJsWjKLck++9KaKx04z/h9h3j/F3TM9Qu++i39omhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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