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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65e8541b411ead73101ea6d9ca9b1b030f693554f0ac2b0817efbfe454dc5bac' 
  AND token = '3I5doK0iJntg6yxQZArKHSdq0CDuWkWlknppH73G47U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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