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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b36f2357ed68c4df0a36310c4cd3e17a07628fe25b0cfc7f67c69051013141ab' 
  AND token = 'p0bhouqib2rv6HJE2FL2SXtYxEtRyR65OEMqsQxElMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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