Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9142f1878764acdbe5d0f86196fa7bfe42590f713f6a6b91841229a21a2e820' 
  AND token = 'B4l64IfApDFUzkY+4otzxynH0EzsgcsrekghzJBPoDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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