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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e808f1a9085fe680514171065f7433fbbf4388b57b3610ce2c0fd355ea33bbf' 
  AND token = 'Hzlngpxt4Z81smR9Myq4ia4cKPLqzL3eGkNuVKVw8LY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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