SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64148dfd3350fbd6782b632ff890c8676d9a60b63d95e3d559c465a5f8856570' 
  AND token = 'Jp3bKMawdywikdO+jBsCvzfy9U4oGYu61Q+VB8vMQYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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