SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c10fbd0944e8183df82c28692bc8f62db04d7dab2eb8aad461d025238fce07b0' 
  AND token = 'gTEGC+PpSDLSkSDvZq+2HRFGMa77c+zjEKGJKcIA5es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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