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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4948f1b8ad5df10c07ee0bd375677d0b4bdc7d6fbeaa862a664a9007e73540b8' 
  AND token = '1GO0wrxmbxkfmkBKcjNcPxjqBLOp5zs2ZdjgZmKjBFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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