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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d90c05cb8b041e7313b8668050d6c527a317f15c2d6114bdf81573e93752c56' 
  AND token = 'pYlyIuc0Xs1ZXRxde4y0aUGnafKKJxHB6Y7k6M5phoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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