Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85818ff9300cd0b7d5e66a7b54b7ad1048ff5671e4ad0d4d161b3d98c68600ac' 
  AND token = 'KJenKbdpVptNnRM6KSMgJfPED/8NMzh9bSHnfDPqaIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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