Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ef60ed676dffec011ce3e96479551bce80812f6388821ed8a34a4d55a1425cb' 
  AND token = 'T4PK/mhYmrDFdeV3JNd+k4Oup6EdHb5CPVytUlEtRUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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