Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50f188a98631754192c99f65c18eee23365ca053158b5d73832dcf44359b7353' 
  AND token = 'SjAilzkdZLPoo2aUoVE/m5Vm1D50JY22qc0EMShW82g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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