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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be9b763decd1d33dedb026ee9cc9f62471f57c1e19aab1b27e89580cf56a48d3' 
  AND token = '1Hf0W0M1/UxTxxs0bplJoAn+c/5vl1a29SG9TWUv5vg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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