Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eb80f4de8615417132871814130964fac7106ec8a2da95e6533476fc7422d0e' 
  AND token = 'sBZe6/CG4SoW6gnkFIsXluxFvBdcyDIGlA1mdPnKX8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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