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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '044a30ad1aa679ba5cf83ad420466be19d5e85fd1d866a1133ef0c6c0188b8f9' 
  AND token = 'KVhwY1LZ52n6eS5zT++ia/O08JrXA0e8ACbWWsVQDoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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