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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41535cfe3f5d0277a705fa24a4d6038151bc04b67e4346d7f89c8076d7a2b55c' 
  AND token = '+WOMbKVRIa/7SIs9V5fVlVeEBZWS73RxREAWerd5Is8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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