Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53695a4d8f9edda2c6207ec6cf2ce80bf7fa7b40d4c2ba460ed735d13306186e' 
  AND token = 'mff2EEnO8ljWNc78DAGiguAUxehllLDCpBTRZcUxzfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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