SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ba93fd7b13c38fbca185d4b03b4015ebba01133d628cbf57501f5ccf97ffbab' 
  AND token = 'mBcx+C06PGjmKLbH8gazv69LH7FI3VuJXf5U+2/EJHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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