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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f42e923eb749a61cd703d51aeb536a92c6ebe9a5dd326223b60712fd0c7b1899' 
  AND token = 'XYdhykVkgkjIForudWl95ZaA3LR8doXFDHgKsHhjXCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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