Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '762b3f831d21eec92c37a7698ee35639b11c0a45cab5b1a1db853033ea72e1b0' 
  AND token = '5h0Bz69v0DRMRzQH+zIhNot4Pe/gSs0RjpEMolOkZqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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