SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dbd6167b6e3efbc49150fdb66d119a94982df965d9d0901106645a2bec937cd7' 
  AND token = '31qxNmU+J98rrnNRvDyBoJvxajZFQnEwdUKLJu/GDIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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