SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6a8606324dbaa6a1650627996ab16fad7c358381003b696614560847204b8cd0' 
  AND token = '9AdR7qcBqflZdnVtkz4v+l/bnpQtpgqBybZ5HU+vHMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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