Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f50b41806dec225b53a1bd1147e63f6ac7c09eaba1d01baa793e43d79f155595' 
  AND token = 'Y0cv6FSZyiTwcRWMELYl1+sNPGM8LhEbNODpfyWIf+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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