Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4288c97887826fe961fdeb0a21978e009a6f6934a5e663c1be105c9a741da5c4' 
  AND token = 'hGm8koU2kGFjBPcMTEIzuGQnHC042B7iicZ8rFsS/u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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