Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91da8a2b9e38ed9d32cc9547129873e056212994fb8c5f230e98a282d9b18225' 
  AND token = 'Ujm+pzepNFeNRBXdWkaZQvc+Z53sRK8O31X2/HShxqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}