Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '902568f2d6c5befed3eaff6ace33663aeed11ff27f3fca88176c82218789fa0d' 
  AND token = 'eQyiIri5Ihhx9X4SDNpAzybXDJiMMQ8sOpGgpVrGG6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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