Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '526fc560f3c56083ad2b2e12d55360751b49613db0de080da4b9e07500cb2a0e' 
  AND token = 'UloasckHVs59PXFSQxfbB33dcRmdkExC1+NH7k39DAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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