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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '65bb1f8c4059274363d9e87932d189a520e0234f131d0701240b463b332f9509' 
  AND token = 'OmywxN7py2xMDPywy2JjHltsFpUgeJ4rFl4hlO0vka0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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