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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '218af8e6a1ed38e6c5e82ba36c23d67a7ce3291abae8b044ac7e132872d15116' 
  AND token = '02wIHviAMSH0KcOIzNGe95cXmY0zsPo2sWXg1otXu9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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