Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcfbcde2d4886644d04cf28330458672786cb3f2f3ba011919909a3730e6162d' 
  AND token = '/Y026E17rchQCEp3tR5+p1MiAGplIlXA9Tb+K8jn0xQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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