Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0baf5bf5ab113bd958659f212227dfb041ab14a771d125927ea3d851ab2690e' 
  AND token = '8ZLPDZCAkgE3KAXX6KNrdvWoqNkmi2+4xUi0Un5bKlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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