Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fbc88839e1f6e7657a2f3604743c9c5aa0ad3d1c4d6fed822ec58b070d93a94' 
  AND token = 'z97k4qVWV1Zad8DAw1Sor1VFc3J0/qDNZdhj/SKKn/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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