Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17bff368cc15b0e76f4c5a04156d36daa2c58fe00b930173a760645bea462ce4' 
  AND token = 'EzI8wPNYkNK56BE9oyD9lASiw4ixZ2CJRBPloxybS+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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