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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4bb205bffd85a6e7bbee6ceeec15fd54293e16049370d5af7706a77ef15ebc1' 
  AND token = 'CUd+X09n6XhCp3uFkO70T88dW5is3VI2BDSMvYAFU2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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