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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '07ff5a8e8156d151798ca424619149f13ca64e8671d0d004c827cc121edd584b' 
  AND token = 'Me4f9/fbBIeEBFvidQhuk097St0r2xZx/x/BjC191Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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