Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f0105c9e3358188e3fbaae1b89c5e405120111fdfcd65ce0ac016fc3dfc711' 
  AND token = 'xS5fpOGBPAjWBSrOQnuIrqoGGb5D6M2qPWw4Zt4RNu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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