Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00cc939ae68a6ce0a0730cc842109b7c1da7806dbb513fe319e371e601f10e5d' 
  AND token = 'vNI43N2si2u8IgBRbShNYQOlUQBQsa99OJVMpgci60M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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