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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dac24b9d9d2cef96afa47b658d63573d5fa51d370a949c85cd04c09deeb89003' 
  AND token = 'J0mHi54uVw5ruIhjkpL0qxLcDaasEPvJk9ICH1ZCu5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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