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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77660ba6bd454615d8fa45fa95f8141121c633dc92d86fbc7acad7d7a91b71b3' 
  AND token = 'SR/ShW4rz5LH9kescyAxmZmHEVYQeEG9kJsg6FOl/dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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