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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04d528ec4f61b261f2973e4a01a9a8a9112ba24668a2ab09ec7b24bfd4f11b8d' 
  AND token = 'p3TAU1pfBbpP9r658+2QN9riHJ9iNENBXDvCZ4dYeEU=' 
  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"
    }
  }
}