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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92cd4cf420979ed64a498e92f8759eef8f4206f44afab1333475a19bb21912fb' 
  AND token = 'EDaJKEWiC3V3LhNwdIspXa5M3lJ02XKlOyqaVxItzpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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