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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ba319f082e3cbd2fa81fa7fd0b41f6f72aabdeff1f811145e86c3585dcf1ae72' 
  AND token = 'xfhdbpR2KgbTgCXmmlESRArw0YwHUiHP/6jxxXk1E44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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