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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1f48f3a8b32d3c25fb8e95927a07451be35ae3d1e274c9851c71de466ae589b' 
  AND token = 'FEMSuNC5V1llcwb0ZHGVTnIqjWl9pxXxd/lxO18L4cs=' 
  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"
    }
  }
}